[10.x]: Add Blade @use directive (#49179)

* Add Blade @use directive

* Allow for `use` without `as`

* Update CompilesUseStatements.php

---------

Co-authored-by: Taylor Otwell <[email protected]>

Author: simonhamp

src/Illuminate/View/Compilers/BladeCompiler.php

@@ -33,6 +33,7 @@ class BladeCompiler extends Compiler implements CompilerInterface
         Concerns\CompilesStacks,
         Concerns\CompilesStyles,
         Concerns\CompilesTranslations,
+        Concerns\CompilesUseStatements,
         ReflectsClosures;
 
     /**

src/Illuminate/View/Compilers/Concerns/CompilesUseStatements.php

@@ -0,0 +1,22 @@
+<?php
+
+namespace Illuminate\View\Compilers\Concerns;
+
+trait CompilesUseStatements
+{
+    /**
+     * Compile the use statements into valid PHP.
+     *
+     * @param  string  $expression
+     * @return string
+     */
+    protected function compileUse($expression)
+    {
+        $segments = explode(',', preg_replace("/[\(\)]/", '', $expression));
+
+        $use = trim($segments[0], " '\"");
+        $as = isset($segments[1]) ? ' as '.trim($segments[1], " '\"") : '';
+
+        return "<?php use \\{$use}{$as}; ?>";
+    }
+}

tests/View/Blade/BladeUseTest.php

@@ -0,0 +1,20 @@
+<?php
+
+namespace Illuminate\Tests\View\Blade;
+
+class BladeUseTest extends AbstractBladeTestCase
+{
+    public function testUseStatementsAreCompiled()
+    {
+        $string = "Foo @use('SomeNamespace\SomeClass', 'Foo') bar";
+        $expected = "Foo <?php use \SomeNamespace\SomeClass as Foo; ?> bar";
+        $this->assertEquals($expected, $this->compiler->compileString($string));
+    }
+
+    public function testUseStatementsWithoutAsAreCompiled()
+    {
+        $string = "Foo @use('SomeNamespace\SomeClass') bar";
+        $expected = "Foo <?php use \SomeNamespace\SomeClass; ?> bar";
+        $this->assertEquals($expected, $this->compiler->compileString($string));
+    }
+}